Plowshare



'I. AND M. HETLANU.

PLOWSHVARE. APPLICATION FILED MAY 6. 1 921.

1 4g 5 1 2 u Patented Aug. 8 1922.-

2 SHEETS-SHEET I.

1Q AND M. HETLAND.

PLOWSHARE. I

APPLICATION FILED MAY 6, 192].

1,425,01 PatentedAug. & 1922.

2 SHEETS-SHEET 2.

JOAMfi' WTLAUMID M43605 WW IN VEN TORJ onirso stares PATENT castes.

JONAS I-IETLAND AND TIIARCUS HETLAN'D, 0F VALLEY CITY, NORTH DAKOTA,

rLowsHARE.

Application filed May 6, 1921.

T 0 all whom it may concern:

Be it known that we, JONAS HETLAND and Marcus HETLAND, citizens of the United States, residing at Valley City, in the county of Barnes and State of North Dakota, have invented new and useful Improvements in Plowshares, of which the following is a specification.

The present invention relates, in general, to plows, and is especially directed to that type of plows having a removable share.

The essential features of the invention consist of a plow share member provided with means adapted, in conjunction with means positioned on a frog associated with such share, to maintain the share in operative relation, and means to securely lock the share against accidental disengagement.

The object of the invention is toprovide a construction having a removable share mem ber adapted to be-quickly and conveniently attached to the frog, and which may be re moved therefrom by hitting the rear end of the share a slight blow with any handy implement, the arrangement and assemblage of the parts being such that in use the tendency is for parts always to bind and tighten so that, while they may be readily disassembled for replacement or repair, all danger of accidental separation of the parts while in use is eliminated.

We accomplish this object by providing a share member with means adapted to engage a plurality of keyhole slots arranged in the frog and having flaring and tapered sides and ribs thereon to receive the share member engaging means here shown as attached to the inner face of the plow share, the arrangement of securing means being such as to tend to lock the share to the frog under normal operative conditions of use of the plow.

The structure which will now be described in detail comprises few and simple parts which can be readily secured together by simple and effective means, so as to present all the advantages of a one-piece plow, and at the same time be readily disassembled from locked relation to permit the share or other parts to be replaced. This ready assembling and disassembling of the parts is desirable for the reason that the expense and time incident to reshaping and sharpening the plow is done away with, and the worn share member may be removed and replaced by a new member which can be furniShG l at Specification of Letters Patent.

Patented Aug. 8, 1222.

Serial No. 467,451.

small expense by the farmer without the nechanges and modifications in the specific structure shown and described that may come within the scope of the appended claims may be made without departing or exceeding the spirit of the invention.

Figure 1 is a top plan view of the plow;

Figures 2 and 3 are side elevational views looking in the direction of the land sideand mold board respectively;

Figure 4 is a bottom perspective view showing the frog secured to the land side and mold board;

Figure 5 is a detail view of the frog det-ached;

Figure 6 is a detail view of the share member detached from the plow;

Figure 7 is a sectional. plan view of the front end of the plow share removed;

Figure 8 is a detail View of the keyhole slot and a lug securing means; I

Figure 9 is a section of Figure 6 taken on the line 9-9;

Figure 10 is a detail section on the line 10-1O of Figure 8.

Referring to the drawings, wherein like letters indicate similar parts, 10 designates a frog member comprising a mold board portion 11, and a land side portion 12 having a reduced portion 13 extending to the forward end of the plow and forming, with the member 11, the point 14. A mold board 15 and a landside 16, which may be integrally formed, are secured to the frog by means of the apertures 17 formed in the frog member 10, through which pass the threaded bolts 18 which secure the mold board and the landside to the frog, suitable securing bolts 19 and washers 20 being provided by which the mold board is secured to the mold board portion 11 of the frog 10.

A plurality of keyhole slots 21 are arranged in the mold board portion 11 of the frog 10, said slots having flaring and tapered sides 22 which form sunken rib members 23. The removable share member 24 having an elongated portion 25 and a base portion 26 has a series 01": lugs 27 attached to the inner keyhole slots 21- on the frog 10 The for-r ward portion 24 of the share has a recess 28 forthe reception of the point 1 1 of the frog, a flange 29 arrangedonthe underside of the base member 26 tends to hold the point 1a of the frog in position, and also forms at its end a tenon 30 which fits a corresponding member 31 located at the forward end of the landside 16.

' The'share, when attached to theplow, has its elongated-member 25 so arranged as to form a continuation of the mold board 15, while the base member 26 lies in longitudi nal' alignment with, and forms a continuation ofthe landside 16, thereduoed' portion 13 of the frog being so cut away as to allow the base 26 to abut against a shoulder 32 on the member 1%, thus allowing the plow share to forman extension of and be backed up by the landside 16.

It will be observed that with this construction, the mold board and landsid'e and the'frog arecoupled by the bolts, asheretofore described,-and thatthe plow"point and sharemember are so'cOnneote'd to the frog and assembled with the other parts by means of the keyhole and tapered slots and the headed studs referred to,"that plowing pressure upon the point and forward share member tends always to tighten the removable'share memberand hold 'it in place. By pocketing the lower end of the share member and engaging that pocketed end with and backing it up by the point of the frog, as described, shearing or breaking strains on the studs which engage thekeyhole slotare eliminated, and the assembled parts are firmly interlocked. Removal of the share member may, however, be readily accomplished by striking the share member at its rear end, driving the head-ed studs out of the keyhole slots and the pocketed point off of the frog point, as will be clearfrom consideration of Figs. 3 and 4c. 7

It willbe understood that such changes from the specific disclosure as are within the range of mechanical skill may be made without departing from the spirit of the invention.

We claim 1. In a device of the class described, the combination of a mold board and land side having a shouldered recess on its under side, a frog having one of its sides provided with sunken slotted seats having stud engaging ribs which converge and are inclined upwardly towards their rear ends, and the other side formed with a forward tapered portion having a reduced shoulder thereon, share having a'rearwardly opening pocket at its forward end to receive the tapered portion of said frog, headed studs on said share to engage said sunken slots and make wedging engagement with said'ribs under plowing pressure, said share member being held against relative forward movement solely by friction, so as to be readily movable to disengage said studs andpoc-ket from the frog.

' 2. Ina device of the class described, the

combination of a'mold board and'land side, having ashouldered recess on its under sides, a frog having one of its sides provided with sunken slotted seats having stud engaging ribs which converge and are inclined upwardly towards their rear ends, said side extending below the edge of the mold board, andthe other side forined with a forward tapered portion having a reduced'shoulder thereon, a removable sharehaving' a rear wardly opening pocket at its forward ends to receive the tapered'por-tion of said frog, and provided with horizontal'and' vertical flanges to abut the landside and tapered portiono'f said frog,headed studs on said share to engage said sunken slots in said frog and heiwedged therein under plowing pressure, but readily releasable therefrom on forward movement of the share relative to said frog and mold "board.

In testimony whereof we have hereunto set our hands. 1 JONASHETLAND.

MAsoUs erman 

